On Gabriela's first birthday, he parents gave her a $50 savings account. On every birthday after that her parents added to the account, increasing the amount they deposited by $25 each year. What is the
total amount Gabriela's parents will have deposited into the account by her 18th birthday?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

The radius of a sphere is 3 inches. which represents the volume of the sphere?